5925899 U-boat in the Bay of Biscay being attacked by aircraft of Coastal Command, 17 July 1942 (b/w photo) by Unknown photographer, (20th century); National Army Museum, London; (add.info.: U-boat in the Bay of Biscay being attacked by aircraft of Coastal Command, 17 July 1942. Photograph, World War Two, War At Sea (1939-1945), 1942. On 17 July 1942 an Armstrong Whitworth Whitley bomber of No. 502 (Ulster) Squadron of RAF Coastal Command attacked and crippled U-751 in the Bay of Biscay. The submarine was unable to dive and was later caught on the surface and sank by a Lancaster bomber from No, 61 Squadron. From a collection of 34 photographs relating to different theatres in World War Two, 1940-1944.); by National Army Museum .